US4991828A - Document feeding apparatus - Google Patents

Document feeding apparatus Download PDF

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Publication number
US4991828A
US4991828A US07/301,060 US30106089A US4991828A US 4991828 A US4991828 A US 4991828A US 30106089 A US30106089 A US 30106089A US 4991828 A US4991828 A US 4991828A
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US
United States
Prior art keywords
document
roller
discharging
original
discharging roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/301,060
Other languages
English (en)
Inventor
Motoshi Mizoguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Assigned to RICOH COMPANY, LTD. reassignment RICOH COMPANY, LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MIZOGUCHI, MOTOSHI
Application granted granted Critical
Publication of US4991828A publication Critical patent/US4991828A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/07—Transporting of cards between stations
    • G06K13/077—Transporting of cards between stations with intermittent movement; Braking or stopping movement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
    • H04N1/0057—Conveying sheets before or after scanning
    • H04N1/00599—Using specific components
    • H04N1/00602—Feed rollers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00684—Object of the detection
    • H04N1/00687—Presence or absence
    • H04N1/00689—Presence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00684—Object of the detection
    • H04N1/00687—Presence or absence
    • H04N1/00694—Presence or absence in an input tray
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00684—Object of the detection
    • H04N1/00702—Position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00742—Detection methods
    • H04N1/00745—Detecting the leading or trailing ends of a moving sheet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3271—Printing or stamping

Definitions

  • This invention generally relates to an apparatus for feeding documents, such as original documents, through a reading section for reading an image on a document, and, in particular, to a document feeding apparatus particularly suitable for use in facsimile machines, copying machines and the like.
  • FIG. 2 A typical prior art document feeding apparatus incorporated in a facsimile machine is illustrated in FIG. 2.
  • the document feeding apparatus includes a pick-up roller 1, a separating roller 2 and a feed roller 3, which together define a document feeding section for feeding original documents 4 one by one.
  • An electromagnetic clutch 5 is mounted on a shaft of the feed roller 3 and a document sensor 6 is provided for sensing the presence or absence of documents.
  • a pair of guide plates 7 and 8 is provided for defining a transportation path for transporting an original document through a reading section. Thus, the original documents 4 are transported along this transportation path one by one when fed.
  • Transportation rollers 9 and 10 are provided spaced apart from each other along the document transportation path.
  • the roller 9 is located at the entrance to a reading section for reading an image of each of the original documents 4 and the roller 10 is located at the exit of such a reading section.
  • Pressure rollers 11 and 12 are also provided to be in pressure contact with the respective rollers 9 and 10.
  • a drive motor 13 is also provided and its power is transmitted to a follower pulley 14 through an endless belt 15.
  • the follower pulley 14 is also operatively associated with the rollers 9 and 10 through an endless belt 16, so that the power transmitted from the drive motor 13 through the endless belt 15 is in turn transmitted to each of the rollers 9 and 10 through the endless belt 16.
  • a contact glass 17 is disposed in the reading section of the document feeding apparatus, and each of the original documents 4 moves in contact with the contact glass 17 when transported through the reading section, whereby the image on each of the original documents 4 is optically read, typically by a scanning method.
  • a document detector 18 is also provided between the roller 9 and the contact glass 17 and a stamper 19 for providing a stamped mark on each of the original documents 4 to indicate the fact that original documents have been optically read.
  • the drive motor 13 When the trailing edge of the first original document 4 has reached a stamp position after moving past the sensor 18, the drive motor 13 is deactivated so that the entire drive system is brought to a halt. And, then, upon completion of receiving a receipt confirmation signal from the other station (approximately 300 milliseconds) and stamping the original document thus read (approximately 300 milliseconds), the drive motor 13 is again set in motion to have the first original document 4 discharged out of the document feeding apparatus. During this time period, the rollers 9 and 10 follow the operation of the drive motor 13.
  • another electromagnetic clutch is provided on a discharge roller for discharging an original document which has been optically read at the reading section, and the discharging roller is operatively disconnected from the drive system as desired to set the discharging roller in a freely rotating condition.
  • Another object of the present invention is to provide an improved high-speed document feeding apparatus.
  • a further object of the present invention is to provide an improved automatic document feeding apparatus having a minimized wait time for reading a next following document.
  • FIG. 1 is a schematic illustration showing a document feeding apparatus incorporated in a facsimile machine constructed in accordance with one embodiment of the present invention
  • FIG. 2 is a schematic illustration showing a typical prior art document feeding apparatus incorporated in a facsimile machine
  • FIG. 3 is a timing chart which is useful for understanding the operation of the apparatus shown in FIG. 1;
  • FIG. 4 is a timing chart which is useful for understanding the operation of the apparatus shown in FIG. 2.
  • FIG. 1 there is schematically shown a document feeding apparatus incorporated in a facsimile machine constructed in accordance with one embodiment of the present invention.
  • the apparatus shown in FIG. 1 is similar in many respects to the apparatus shown in FIG. 2 and thus similar elements are indicated by similar numerals.
  • a description set forth above regarding FIG. 2 should also be applicable to the present apparatus shown in FIG. 1 as far as common elements are concerned.
  • the present apparatus shown in FIG. 1 differs from the prior art apparatus shown in FIG. 2 in the additional provision of an electromagnetic clutch 20 in a shaft of the document discharging roller 10 for discharging an original document 4 from the reading section.
  • the document discharging roller 10 can be set in a freely rotatable condition by having the roller 10 operatively disconnected from the drive system or train including the drive motor 13.
  • step (1) The operation of the present apparatus is similar from step (1) to step (4) set forth above with reference to FIG. 2.
  • step (4) set forth above with reference to FIG. 2.
  • the drive motor 13 is still maintained in operation as different from the prior art apparatus of FIG. 2 and the clutch 20 is deenergized or turned off to thereby have the document discharging roller 10 operatively decoupled from the drive system or train including the drive motor 13.
  • the preceding original document 4 is temporarily brought to a halt since the paper discharging roller 10 is temporarily decoupled from the drive system, and a transmission completion protocol procedure and a stamping operation are carried out.
  • the next following original document 4 is transported along the transportation path, and when its trailing edge has been detected by the sensor 18, a pre-transmission protocol procedure can be initiated. In this manner, in accordance with the present invention, since the next following original document can be transported even if the preceding original document is being temporarily halted, the wait time for reading the next following original document is minimized.
  • an electromagnetic clutch is provided on the document discharging roller for discharging an original document from a document reading section so that the document discharging roller can be temporarily decoupled from a drive system or train including a drive motor. Therefore, a document feeding roller for feeding an original document into the reading section can be maintained in operation even if the document discharging roller is temporarily set motionless, so that the next original document may be set ready for a reading operation. Thus, the wait time for reading the next following original document is minimized.
  • the load encountered by the drive system is also relaxed slightly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimiles In General (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US07/301,060 1988-01-25 1989-01-25 Document feeding apparatus Expired - Fee Related US4991828A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1988007049U JPH07451Y2 (ja) 1988-01-25 1988-01-25 原稿読取搬送装置
JP63-7049 1988-01-25

Publications (1)

Publication Number Publication Date
US4991828A true US4991828A (en) 1991-02-12

Family

ID=11655201

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/301,060 Expired - Fee Related US4991828A (en) 1988-01-25 1989-01-25 Document feeding apparatus

Country Status (2)

Country Link
US (1) US4991828A (enrdf_load_stackoverflow)
JP (1) JPH07451Y2 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240789A (en) * 1992-02-20 1993-08-31 Rand Mcnally & Company Multi-layer labels
US5497250A (en) * 1993-08-12 1996-03-05 Ricoh Company, Ltd. Document scanning apparatus having a stamp and method for controlling the stamping position
US5506606A (en) * 1991-08-02 1996-04-09 Canon Kabushiki Kaisha Record apparatus
US5764371A (en) * 1994-12-19 1998-06-09 Ricoh Company, Ltd. Image forming apparatus for indicating completion of scanning for both sides of an orginal document
US5794927A (en) * 1994-11-07 1998-08-18 Canon Kabushiki Kaisha Sheet conveying apparatus
US20040017037A1 (en) * 2002-03-29 2004-01-29 Seiko Epson Corporation Sheet feeder and recording apparatus incorporating the same
US20090115128A1 (en) * 2007-11-06 2009-05-07 Foxlink Image Technology Co., Ltd. Automatic document feeder
US20190068815A1 (en) * 2017-08-22 2019-02-28 Ricoh Company, Ltd. Image reading device and image forming apparatus incorporating same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575410A (en) * 1967-09-20 1971-04-20 Ricoh Kk Automatic card feeding device
US4171128A (en) * 1978-01-03 1979-10-16 Pitney-Bowes, Inc. Document feeder for a copier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021789Y2 (enrdf_load_stackoverflow) * 1971-04-14 1975-07-01
JPS607586U (ja) * 1983-06-29 1985-01-19 株式会社日立製作所 冷蔵庫の扉体

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575410A (en) * 1967-09-20 1971-04-20 Ricoh Kk Automatic card feeding device
US4171128A (en) * 1978-01-03 1979-10-16 Pitney-Bowes, Inc. Document feeder for a copier

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506606A (en) * 1991-08-02 1996-04-09 Canon Kabushiki Kaisha Record apparatus
US5240789A (en) * 1992-02-20 1993-08-31 Rand Mcnally & Company Multi-layer labels
US5497250A (en) * 1993-08-12 1996-03-05 Ricoh Company, Ltd. Document scanning apparatus having a stamp and method for controlling the stamping position
US5794927A (en) * 1994-11-07 1998-08-18 Canon Kabushiki Kaisha Sheet conveying apparatus
US5764371A (en) * 1994-12-19 1998-06-09 Ricoh Company, Ltd. Image forming apparatus for indicating completion of scanning for both sides of an orginal document
US6067170A (en) * 1994-12-19 2000-05-23 Ricoh Company, Ltd. Image forming apparatus for indicating completion of scanning for both sides of an original document
US20040017037A1 (en) * 2002-03-29 2004-01-29 Seiko Epson Corporation Sheet feeder and recording apparatus incorporating the same
US6899326B2 (en) * 2002-03-29 2005-05-31 Seiko Epson Corporation Sheet feeder and recording apparatus incorporating the same
US20090115128A1 (en) * 2007-11-06 2009-05-07 Foxlink Image Technology Co., Ltd. Automatic document feeder
US7611137B2 (en) * 2007-11-06 2009-11-03 Foxlink Image Technology Co., Ltd. Automatic document feeder
US20190068815A1 (en) * 2017-08-22 2019-02-28 Ricoh Company, Ltd. Image reading device and image forming apparatus incorporating same
US10491768B2 (en) * 2017-08-22 2019-11-26 Ricoh Company, Ltd. Image reading device configured to selectively stop a sheet based on image reading readiness and image forming apparatus incorporating same

Also Published As

Publication number Publication date
JPH01111654U (enrdf_load_stackoverflow) 1989-07-27
JPH07451Y2 (ja) 1995-01-11

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AS Assignment

Owner name: RICOH COMPANY, LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MIZOGUCHI, MOTOSHI;REEL/FRAME:005487/0392

Effective date: 19890109

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19950215

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362